MERCRUISER
Cooling System
SERPENTINE BELTS
BELT INTERCHANGE
Part #
OE #
Width Length Part #
OE #
Width
Length
18-15115
57-861757
13/16
97.5
18-15100
57-863876 3
13/16
106.25
18-15116
57-861758
13/16
86.75
18-15101
57-863876 4
13/16
76.5
18-15117
57-861759
13/16
92.5
18-15102
57-863876 6
13/16
105
18-15119
57-863876 1
13/16
111.25
18-15103
57-863876 7,
18-15120
57-863876 2
13/16
90
57-865615007
13/16
96.75
18-15121
57-865615005
13/16
87.5
18-15104
57-863876 8
13/16
99.5
18-15122
57-865615010
13/16
86
18-15105
57-863876 9,
18-15123
57-864639
13/16
85
57-865615009
13/16
69.75
18-15124
57-881754
1-1/16
55.75
18-15112
57-807755-4
13/16
88
18-15125
57-817113
1-3/8
53.5
18-15113
57-807755-5
13/16
75.75
18-15114
57-861049
13/16
104.25
BELT APPLICATION
Engine
Years
Serial #
Part #
Mercruiser # Footnote
Engine
Years
Serial #
Part #
Mercruiser #
Footnote
4.3L Alpha
1996-99
OF803000-OL618999
18-15113
57-807755-5
4
5.7L Bravo
1997-99
OK001506-OL618999
18-15115
57-861757
2, 6
5.7L Bravo
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5, 7
4.3L Alpha
1996-99
OF803000-OL618999
18-15116
57-861758
2, 6
4.3L Alpha
1996-99
OF803000-OL618999
18-15117
57-861759
2, 5
5.7L Bravo
2000-04
OL619000 & up
18-15104
57-863876 8
4, 7
4.3L Alpha
2000-04
OL619000 & up
18-15101
57-863876 4
3, 6, 7
5.7L Ski
1997-02
OK040004-OM316999
18-15112
57-807755 4
5.7L Ski
2002-05
OM317000 & up
18-15121
57-865615005
4.3L Alpha
2000-04
OL619000 & up
18-15104
57-863876 8
4, 5, 7
4.3L Alpha
2000-04
OL619000 & up
18-15105
57-865615009
4, 6, 7
5.7L MIE
2001-05
OL677227 & up
18-15121
57-865615005
4.3L Bravo
1996-99
OF803000-OL618999
18-15114
57-861049
2, 5
377 Scorpion MCM
1999-04
OL416146 & up
18-15115
57-861757
377 Scorpion Ski
1997-98
OK000656 & up
18-15112
57-807755 4
4.3L Bravo
1996-99
OF803000-OL618999
18-15115
57-861757
2, 6
4.3L Bravo
2000-04
OL619000 & up
18-15104
57-863876 8
4, 7
454 Mag MPI
1998-01
OL010029-OM024999
18-15114
57-861049
1
5.0L Bravo
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5, 7
454 Mag MPI
1998-01
OL010029-OM024999
18-15102
57-863876 6
2
5.0L Alpha
1998-99
OL012052-OL618999
18-15113
57-807755-5
4, 6
5.0L Alpha
1998-99
OL012052-OL618999
18-15114
57-861049
5
454 Mag MPI
1998-01
OL010029-OM024999
18-15103
57-865615007
4
5.0L Alpha
1998-99
OL012052-OL618999
18-15116
57-861758
2,6
454MagMPIHorizonMIE
1998-01
OL002200-OL674000
18-15103
57-865615007
496 Mag & HO
2000-04
OM025000 & up
18-15119
57-863876 1
5.0L Alpha
2000-04
OL619000 & up
18-15101
57-863876 4
3, 6, 7
5.0L Alpha
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5, 7
500 EFI
1999-04
OL001477 & up
18-15112
57-807755 4
5.0L Alpha
2001-04
OL619000 & up
18-15104
57-863876 8
4, 5, 7
502 Mag MPI
1998-01
OL017000-OM024999
18-15114
57-861049
1
502 Mag MPI
1998-01
OL017000-OM024999
18-15103
57-865615007
4
5.0L Alpha
2000-04
OL619000 & up
18-15105
57-865615009
4, 6, 7
5.0L Bravo
1998-99
OL012052-OL618999
18-15114
57-861049
2, 5
502 Mag. MPI
1998-01
OL017000-OM024999
18-15102
57-863876 6
2
5.0L Bravo
1998-99
OL012052-OL618999
18-15115
57-861757
2, 6
525 SC
1991-96
0D456000-745215
18-15125
57-817113
525 EFI
2003-04
OM900146 & up
18-15120
57-863876 2
5.0L Bravo
2000-04
OL619000 & up
18-15104
57-863876 8
4, 7
350 Mag, Alpha
1997-04
OK001501-OL618999
18-15113
57-807755-5
4, 6
575 Sci
2000-05
0L306696 & up
18-15125
57-817113
8
350 Mag, Alpha
1997-04
OK001501-OL618999
18-15114
57-861049
2, 5
575 Sci
2000-05
OL306696 & up
18-15112
57-807755 4
9
600 SC
1991-96
0D456489-0F877462
18-15125
57-817113
350 Mag, Alpha
1997-04
OK001501-OL618999
18-15116
57-861758
2, 6
350 Mag, Alpha
2000-04
OL619000 & up
18-15103
57-865615007
3, 6, 7
600 SC
1998
0K000227 & up
18-15125
57-817113
350 Mag, Alpha
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5, 7
7.4L MPI
1998-01
OL010003-OM024330
18-15114
57-861049
1
7.4L MPI
1998-01
OL010003-OM024330
18-15102
57-863876 6
2
350 Mag, Alpha
2000-04
OL619000 & up
18-15104
57-863876 8
4, 5, 7
350 Mag, Alpha
2000-04
OL619000 & up
18-15105
57-865615009
4, 6, 7
7.4L MPI
1998-01
OL010003-OM024330
18-15103
57-865615007
4
350 Mag, Bravo
1997-04
OK001501-OL618999
18-15114
57-861049
2, 5
7.4L MPI MIE
1998-01
OL002006-OM025999
18-15103
57-865615007
Black Scorpion Ski
1997-01
OK040001-OM391599
18-15112
57-807755 4
350 Mag, Bravo
1997-04
OK001501-OL618999
18-15115
57-861757
2, 6
350 Mag, Bravo
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5, 7
Black Scorpion Ski
2003-05
OM391600 & up
18-15121
57-865615005
350 Mag, Bravo
2000-04
OL619000 & up
18-15104
57-863876 8
4, 7
MX 6.2L Blk Scorpion Ski
2001
OL670015-OM391599
18-15112
57-807755 4
MX 6.2L MPI
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5
350 Mag MPI MIE
2001-05
0L678399-up
18-15121
57-865615005
6
350 Mag MPI MIE
2002-05
OM317000 & up
18-15122
57-865615010
5
MX 6.2L MPI
2000-04
OL680003 & up
18-15104
57-863876 8
4, 7
350 Mag MPI Ski
2001-05
OM300000 & up
18-15121
57-865615005
MX 6.2L MPI Horizon
2002-04
OM600000 & up
18-15102
57-863876 6
3
MX 6.2L MPI Horizon
2001-04
OM300000 & up
18-15104
57-863876 8
4
350MagMPIHorizonMIE
2001-02
OL678399-OM316999
18-15121
57-865615005
350MagMPIHorizonMIE
2001-05
OM317000 & up
18-15122
57-865615010
MX6.2LMPIHorizonMIE
2001
OM300000-OM310099
18-15112
57-807755 4
5.7L Alpha
1997-99
OK001506-OL618999
18-15113
57-807755-5
4, 6
MX6.2LMPIHorizonMIE
2001-05
OM310100 & up
18-15121
57-865615005
6
MX6.2LMPIHorizonMIE
2002-05
OM317000 & up
18-15122
57-865615010
5
5.7L Alpha
1997-99
OK001501-OL618999
18-15114
57-861049
2, 5
5.7L Alpha
1997-99
OK001506-OL618999
18-15116
57-861758
2, 6
MX 6.2L MPI MIE
1999-01
OL670000-OM310099
18-15112
57-807755 4
5.7L Alpha
2000-04
OL619000 & up
18-15101
57-863876 4
3, 6, 7
MX 6.2L MPI MIE
2001-05
OM310100 & up
18-15121
57-865615005
6
MX 6.2L MPI MIE
2002-05
OM317000 & up
18-15122
57-865615010
5
5.7L Alpha
2002-04
OM600000 & up
18-15102
57-863876 6
3, 5, 7
5.7L Alpha
2000-04
OL619000 & up
18-15104
57-863876 8
4, 5, 7
MX 6.2L MPI Ski
2002-05
OM317000 & up
18-15121
57-865615005
5.7L Alpha
2000-05
OL619000 & up
18-15105
57-865615009
4, 6, 7
8.1S MPI MIE & HO
2000-04
OM025000 & up
18-15120
57-863876 2
8.2L MPI MIE
1998-01
OL002450-OL674200
18-15103
57-865615007
5.7L Bravo
1997-99
OK001506-OL618999
18-15114
57-861049
2, 5
Footnote